diff --git a/blotztask-ui/src/app/signup/page.tsx b/blotztask-ui/src/app/signup/page.tsx
index b9c21c8..d6074cb 100644
--- a/blotztask-ui/src/app/signup/page.tsx
+++ b/blotztask-ui/src/app/signup/page.tsx
@@ -40,7 +40,7 @@ const SignUpPage = () => {
 
   const handleError = (error: unknown) => {
     if (error instanceof BadRequestError) {
-      setError(error.details ? Object.values(error.details).flat().join(' ') : error.message);
+      setError(error.details ? Object.values(error.details.errors).flat().join(' ') : error.message);
     } else {
       console.error('Unexpected error during registration:', error);
       setError("An unexpected error occurred. Please try again later.");
diff --git a/blotztask-ui/src/utils/http-client.ts b/blotztask-ui/src/utils/http-client.ts
index 06732a6..b8c16b9 100644
--- a/blotztask-ui/src/utils/http-client.ts
+++ b/blotztask-ui/src/utils/http-client.ts
@@ -20,7 +20,7 @@ export async function fetchWithErrorHandling<T>(
           const json = await response.json();
 
           if (response.status === 400) {
-              throw new BadRequestError(json.errors.title || "Bad Request", json || null);
+              throw new BadRequestError(json.title || "Bad Request", json || null);
           }
           if (response.status >= 500) {
               throw new ServerError(json.errors.title || "Server Error", json || null);